I need to take a survey soon and find which file type is preferred by you.  Here is one specifically for the iPhone and iPod.  Let me know if this version is better, or not necessary since the other mp4 files can easily be converted in iTunes.  Thanks.

Source: Lemay, Laura (1998). SAMS teach yourself Web Publishing with HTML 4 in 21 days. Indianapolis, IN: Sams Publishing.  By the way, a great resource on Web Literacy can be found in Alan November’s book, “Web Literacy for Educators”:   November, A., (2008). Web Literacy for Educators. Thousand Oaks: Corwin Press.  Or check out Novemberlearning.com.